JPH0554207A - Remote control system - Google Patents

Abstract

PURPOSE:To prevent control information from leaking or being forged and obrain high security even when a public telephone line is used by deciphering the control information which is ciphered and sent and controlling termianl equipments. CONSTITUTION:A public telephone 1 ciphers information required for control over home equipments 19-22 by an IC card 10 and sends the information to a home terminal equipment 12. The home terminal equipment 12 receives it and controls the home equipments 19-22 according to the deciphered information. In this case, the home termianl equipment 12 recognizes control ranges of corresponding equipments from its own data by using equipment-by-equipment control rank data recognized by its own deciphering algorithm, etc., and card characteristic data, ciphers data meaning the end of the recognition including the result, and sends the data to the public telephone 1. The public telephone 1 deciphers the received data by the IC card 10 with a deciphering command and determines a final selection according to the response.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a portable storage medium called an IC card and a terminal device (for example, a public telephone) capable of handling the portable storage medium.
The present invention relates to a remote control system for remotely controlling devices in a home by using a computer.

[0002]

2. Description of the Related Art Recently, a system for remotely controlling home appliances using an IC card terminal has been considered. In this case, the control information is transmitted from the terminal device in order to control the home device.

[0003]

For example, when a public telephone is regarded as a terminal device, it is expected that a public line will be used when transmitting control information from the terminal device. In that case, the control information may be leaked or tampered with.

The control information is stored in the terminal device and is read out and transmitted as needed. However, it is a security measure to keep the control information resident in the terminal device. Sex will be reduced.

Therefore, an object of the present invention is to provide a remote control system which can prevent leakage or falsification of control information even if a public line is used for transmission of control information and can ensure high security. To do. Also,
An object of the present invention is to provide a remote control system capable of ensuring higher system security.

[0006]

A remote control system according to a first aspect of the present invention uses a portable storage medium and a terminal device that can handle the portable storage medium and is installed at a first location. Is a system for remotely controlling a device installed at a second location, the encryption device encrypts control information transmitted from the terminal device, and the encryption device encrypts the control information. It is provided with a decoding means for decoding the transmitted control information, and a control means for controlling the device based on the control information decoded by the decoding means.

A remote control system according to a second aspect of the present invention is capable of handling a portable storage medium and this portable storage medium, and uses a terminal device installed at the first location to provide a second storage location. A system for remotely controlling an installed device, wherein in the terminal device, transmitting means for reading and transmitting control information registered in advance in the portable storage medium, and receiving control information transmitted by the transmitting means. Then, a control means for controlling the device based on the control information is provided.

[0008]

According to the first aspect of the present invention, all the control information transmitted from the terminal device is encrypted, and the publicly controlled line is introduced into the remote control system by decrypting and using the control information on the device side. Even in this case, it is possible to prevent leakage or falsification of control information, and to ensure high security.

According to the second aspect of the present invention, the control information used for controlling the device is registered in the portable storage medium in advance, and when it is used, the control information is read and transmitted, so that the terminal device installed can be controlled. Since no control information is detected, higher system security can be ensured.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a remote control system according to this embodiment. In the figure, reference numeral 1 denotes a public telephone as a terminal device for an IC card, such as a modem 2, a handset 3, a liquid crystal display unit 4, a coin processor 5, a keyboard 6, a card reader / writer 7, and a control unit 8 for controlling these. It is composed by. The card reader / writer 7 reads / writes data from / to the telephone prepaid card 9 or the IC card 10 inserted through a card insertion slot (not shown).

The public telephone 1 thus constructed is connected to the home terminal device 12 installed in the home via the public line 11. The home terminal device 12 includes a modem 13, a liquid crystal display unit 14, a keyboard 15, a card reader / writer 16, a control unit 17 for controlling these, and the like. The card reader / writer 16 has the same function as the card reader / writer 7.

The home terminal device 12 includes a home telephone 1
8, and devices for remote control at home, such as a facsimile device 19, a television receiver 20, a video device 21,
The hot water supply controller 22 of the bus and the like are respectively connected.

FIG. 2 shows the structure of the IC card 10 in detail. The CPU 31 controls the overall control, the contact section 32 for making electrical contact with the card reader / writer,
A ROM 33 that stores a control program of the CPU 31 and an encryption program for encrypting information, a RAM 34 that is used for temporary storage of information, a nonvolatile memory 35 such as an EEPROM that stores various information, and various information is input. It is composed of a keyboard 36, a liquid crystal display unit 37 for displaying input information or output information, and the like.

The non-volatile memory 35 is an area 38 for storing a personal identification code number, an area 39 for storing a home telephone number list for remote control, and an area for storing an encryption key used to encrypt information. 40, a region 41 for storing a controllable home device list, a region 42 for storing device-specific control rank data, a region 43 for storing control information for controlling each home device, and a region for storing other information 44 and the like.

FIG. 3 shows a format of control information for controlling the video equipment 21, for example, and comprises a reservation person name, cassette information, channel information, start time information, end time information and the like. This control information is input in advance for each home device using the keyboard 36 and the liquid crystal display unit 37, and the non-volatile memory 35
It can be registered (stored) in the area 43 therein.

In the case of an IC card which does not have a keyboard and a liquid crystal display unit, control information is input using the public telephone 1 or the home terminal device 12, for example.
It is also possible to register in the IC card.

Next, the operation of the above arrangement will be described with reference to the flow chart shown in FIG. First, the operator inserts a coin into a coin slot (not shown) according to an instruction on the display unit 4 of the public telephone 1 or inserts a telephone prepaid card 9 or an IC card 10 into a card slot (not shown). Select whether to do. If a coin is inserted here or the prepaid card 9 is inserted, a normal call process is performed.

When the IC card 10 is inserted,
The public telephone 1 and the inserted IC card 10
Mutual authentication command confirms mutual validity. If the validity cannot be confirmed here, the public telephone 1
Displays an error message (for example, "This card cannot be used") on the display unit 4, ejects the received IC card 10 to the card insertion slot, and confirms that the IC card 10 has been removed. Display the initial screen of 4
To display.

Here, if the validity of the received IC card 10 can be confirmed, the public telephone 1 determines that the IC card 10
A read command is executed to read card processing information from the internal memory 35. Next, when the public telephone 1 determines that the response data of the read command is not valid (for example, the card processing information is not recorded), the public telephone 1 similarly proceeds to the card ejection processing.

At this time, when it is determined that the card is valid, the public telephone 1 next determines from the card processing information read from the IC card 10 whether the inserted card is a card to be used for a prepaid card (the first card). Case), a card used to control the home device (second case), or a card capable of both (third case). If it is determined to be the first case,
Similar to the case where the coin or the like is inserted, the normal call processing is performed.

If it is determined that the case is the second case, the process proceeds to the next home device control process. When it is determined that the case is the third case, the public telephone 1 displays the selection screen on the display unit 4 (for example, “Call: 1 Home device control:
2) Please select one with the key ”) and prompt the operator to select it. Therefore, the operator operates the keyboard 6 or the like according to the instruction.

At this time, when the call menu is selected (for example, the key [1] is pressed), the normal call processing is performed, and the home device control menu is selected (for example, the key [2] is selected. [] Is pressed), the process proceeds to home device control processing.

Now, when the process shifts to the domestic device processing, the public telephone 1 first requests the operator to input the personal identification number on the display unit 4. In accordance with this, the operator inputs a personal identification number known to him / her by using the keyboard 6. The public telephone 1 notifies the IC card 10 of the input personal identification number by a personal identification collation command. IC card 10
When this is received, the personal identification number held in the memory 35 is collated, and the public telephone 1 is notified of the collation result. At this time, if the collation does not match, the process proceeds to the card ejection process.

If the personal identification numbers match, then the public telephone 1 displays on the display unit 4 an instruction to input the home telephone number that the operator wants to operate. The operator accordingly inputs a predetermined telephone number using the keyboard 6. When you confirm that the input is complete, pay phone 1
Reads the telephone number list from the memory 35 of the IC card 10 by a read command and confirms whether the telephone number input by the operator is in the list. If it does not exist, the next telephone number is instructed and the same processing is performed.

If the telephone number entered by the operator exists, the public telephone 1 opens the line to the corresponding home terminal device 12 via the public line 11 and the IC card. Request mutual authentication processing with 10. In response to this, the home terminal device 12 confirms the mutual validity by using the mutual authentication command to the IC card 10. Then, the home terminal device 12 encrypts the result using the encryption algorithm and the key that the home terminal device 12 has, and notifies the public telephone 1 of this.

Upon receiving the encrypted data from the home terminal device 12, the public telephone 1 sends the decryption command with the received data (encrypted data) to the IC card 10 and sends the decrypted data from the IC card 10. wait. If the decrypted data indicates that the decrypted data is invalid, the public telephone 1 determines that the home terminal device 1 and the IC card 10 cannot mutually confirm the validity, and proceeds to the card ejection process.

If the decrypted data from the IC card 10 indicates that it is valid, then the public telephone 1 reads the controllable home device list registered in the memory 35 of the IC card 10. It is read by a command and displayed on the display unit 4.

Here, when the operator inputs the number (ID1 to ID4) of the device to be controlled from the keyboard 6, the public telephone 1 will display the corresponding device number (for example, "1111 if controlling the video device 21"). , "2222" for controlling the hot water supply controller 22) is found from the controllable home device list read from the previous IC card 10 and is registered in the memory 35 of the IC card 10. The separate control rank data and the card-specific data are read by a read command, and these are read by the IC card 10
Is notified by an encrypted command.

When the encrypted data is received from the IC card 10, the public telephone 1 sends it as it is to the home terminal device 12 via the public line 11. When receiving this, the home terminal device 12 recognizes the device number, the device-specific control rank data, and the card-specific data by decoding the received data using its own decoding algorithm and key.

When the recognition of the received data is completed, the home terminal device 12 next determines the control range of the corresponding device (for example, the operator for the device from the recognized device-specific control rank data and the card-specific data). Whether the control is possible or only the state of the device can be confirmed) is confirmed by its own data, and the data including the result indicating that the recognition is completed is encrypted and notified to the public telephone 1.

Upon receiving this, the public telephone 1 causes the IC card 10 to decrypt the received data by a decryption command, and determines the recognition result from the response.
If the result is normal, then the public telephone 1 prompts the operator to make an operation item selection instruction on the display unit 4 based on the control range data notified from the home terminal device 12.
At this time, if the control range can confirm only the state of the device, the process shifts to the corresponding process, and if the control is possible, the display unit 4 displays a selection instruction to perform control or confirm the state.

Here, by the operator selecting and instructing the control of the home equipment with the keyboard 6,
For example, the processing according to the flowchart shown in FIG. 5 is executed.

FIG. 5 shows a flowchart for controlling the video equipment 21 and making a reservation, for example. That is,
As described above, when the operator selects and instructs the control of the home device, in this example, the video device 21, using the keyboard 6, the video reservation selection ends. Then, the public telephone 1 sends a video device status transmission request command to the home terminal device 12. Upon receiving this, the home terminal device 12 checks the state of the video equipment 21 and sends the state data to the public telephone 1.

When receiving the status data of the video equipment 21 from the home terminal device 12, the public telephone 1 displays the status of the video equipment 21 on the display unit 4 based on the status data, and the video equipment 21 can be used. If it cannot be used, a control end display is displayed on the display unit 4 and the card discharging process is started.

As a result of the above judgment, if the video device 21 is usable, the public telephone 1 reads the control information of the video device 21 registered in the memory 35 of the IC card 10 by the read command, and according to the control information. By sending the information necessary for reservation to the home terminal device 12 via the public line 11, the recording reservation instruction of the video device 21 is issued.

In this case, the public telephone 1 encrypts the information necessary for reservation with the IC card 10 and then sends it to the home terminal device 12, which receives and decrypts it, and this decryption is performed. Video device 21 based on the converted information
To control.

The control information read from the memory 35 of the IC card 10 is encrypted as it is and the home terminal device 1
It is also possible to send it to No. 2 and decode it by the home terminal device 12 to control the video equipment 21.

In this way, when all control processing is completed,
The payphone 1 registers the data of the process in the memory 35 of the IC card 10 by a write command, confirms that the operator has performed a predetermined operation, for example, turns on the card discharge key, and performs the card discharge process. Do.

In the above process, the operation instruction data or the like generated by the operator on the public telephone 1 side is encrypted by the IC card 10 each time and sent to the home terminal device 12 via the public line 11. The processing result data and the like sent from the home terminal device 12 are encrypted by the home terminal device 12 and notified to the public telephone 1 via the public line 11. At this time, pay phone 1
Causes the IC card 10 to decrypt the notified data and use it for the subsequent processing.

As described above, all the control information (including not only the control information registered in the IC card but also other control information) sent from the public telephone is encrypted and decrypted at the home terminal device. Even if a public line is introduced into a remote control system by using the same for controlling home appliances, leakage or falsification of control information can be prevented and high security can be secured.

Further, all the control information used for controlling the home equipment is registered in the IC card in advance, and when it is used, the control information is read and transmitted to the home terminal device, so that it is installed in the public terminal. Since no control information is detected from the telephone, higher system security can be secured.

[0043]

As described above in detail, according to the present invention, all the control information transmitted from the terminal device is encrypted, and the remotely controlled device side decrypts and uses the control information to establish a public line. Even if it is introduced into a remote control system, it is possible to provide a remote control system that can prevent leakage or falsification of control information and ensure high security.

Further, according to the present invention, the control information used for controlling the device is registered in advance in the portable storage medium, and the information is read and transmitted at the time of use, so that the installed terminal device can Since the control information is not detected, it is possible to provide a remote control system capable of ensuring higher system security.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a remote control system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of an IC card in detail.

FIG. 3 is a diagram showing a format example of control information for controlling a video device.

FIG. 4 is a flowchart for explaining an overall operation.

FIG. 5 is a flowchart illustrating a control process of the video device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Public telephone (terminal device), 4 ... Display part, 7 ... Card reader / writer, 8 ... Control part, 9 ... Prepaid card (portable storage medium), 10 ... IC card (portable storage medium), 11 ... Public line, 12 ... Home terminal device, 1
9 to 22 ... Domestic equipment, 35 ... Non-volatile memory.

Claims (2)

[Claims] 1. A portable storage medium and a system capable of handling the portable storage medium, wherein a terminal device installed at a first location is used to remotely control a device installed at a second location. And an encryption means for encrypting the control information transmitted from the terminal device, and a decryption means for decrypting the control information encrypted by the encryption means and transmitted from the terminal device, A remote control system comprising: a control unit that controls the device based on the control information decrypted by the decryption unit. 2. A portable storage medium and a system capable of handling the portable storage medium, wherein a terminal device installed in the first location is used to remotely control a device installed in the second location. In the terminal device, a transmitting unit that reads out and transmits control information registered in advance in the portable storage medium, and, when the control information transmitted by the transmitting unit is received, the device is based on the control information. A remote control system comprising: